Manufacture of impregnated material.



UNITED STATES ATENT OFFICE.

JEAN ROSEN, or PARIS, FRANCE, ASSIGNOR 'ro sooIE'rfii ANONYME DES GOMBUSTIBLES INDUSTRIELS, or PARIS, FRANCE.

MANUFACTURE OF IMPREGNATED MATERIAL.

Patented July 23, 1918.

No Drawing. Application filed January 11, 1915, Serial No. 1,707. Renewed May 29, 1918. Serial No. 237,368.

To all whom it may concern:

Be it known that of France, residing at Paris, France, have invented certain new and useful Improvements in the Manufacture of Impregnated Material, of which the following is a specification.

This invention relates to improvements in a process for impregnating rigid or flexible bases of material such as paper, cardboard, cloth or leather and the like, and more particularly the present invention relates to improvements over that process disclosed in Letters Patent #1,155,443, granted to me on the 5thday of October, 1915.

An object of the invention is to provide a process for coating paper or the like, Whereby to form a material possessing sufficient flexibility to permit the material to be rolled or folded, without cracking, and to provide a relatively hard surface thereon to prevent adhesion of the layers of material when rolled or folded, and to resist wear.

In carrying the present invention into practice; the base, which may be of porous material, is first dehydrated in any suitable manner such as to also remove any gaseous constituent and thereby leave the pores accessible to the coating material to permit greater penetration thereof.

The base thus dehydrated then has applied thereto a coating or layer of coal tar oils which have first been oxidized. After this coating or layer has been applied a la er of talc, silica or barium or calcium sul ate' is applied thereto by dusting the tale upon the coating of oils while the same is moist, and on top of that another layer of coal tar oils which are more highly oxidized than the first mentioned layer, then another layer of talc or the like as before stated and then another layer of coal tar oils still more highly oxidized than either of the first two layers and so on.

I, JEAN RosnN, a citizen oxidized thereby retaining From the foregoing it will be obvious that the layers of oils first applied will be more flexible owing to their low degree of oxidation, and the layers next applied in order will be relatively harder as the material composing said layers is more highly oxidized. As a result a material is formed which possesses flexibility and at the same time presents a surface sufliciently hard to resist ordinary wear. Furthermore, owing to the interposition of the tale or similar material, the same provides a durable wearing surface, and as each layer of tale is worn away, the succeeding layer of tale is exposed for further wearing purposes. The layers of oils as they become exposed to the atmosphere through wear, will become the normal hard surface of the material.

I claim:

1. The herein described process which consists, in dehydrating a base, applyin a coating of tar oils thereto, applying a ayer of tale to such layer of tar oils, and then successively applying thereto coatings or layers of tar oils having different degrees of oxidation from the first mentioned coating.

2. The herein described process which consists, in dehydratin a base, and then successively applying t ereto layers or coatings of tar oils each layer of which has a diifer ent degree of oxidation than the other layers.

3. The herein described process which consists, in dehydrating a base, and then successively applying thereto coatings or layers of tar oils having difierent degrees of oxidation.

In testimony whereof I have aflixed my signature in presence of two witnesses.

JEAN ROSEN. 

